Home / 428,743,217.60-643,114,826.40-389,204,007.20

Finding the Fourth Proportional to 428,743,217.60, 643,114,826.40 and 389,204,007.20

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Solution

The fourth proportional to 428,743,217.60, 643,114,826.40 and 389,204,007.20 is: 583,806,010.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,743,217.60 : 643,114,826.40 = 389,204,007.20 : x
  2. Step 2: Convert to fraction form
    428,743,217.60/643,114,826.40 = 389,204,007.20/x
  3. Step 3: Cross multiply
    428,743,217.60x = 643,114,826.40 × 389,204,007.20
  4. Step 4: Simplify right side
    428,743,217.60x = 250,302,867,524,612,320
  5. Step 5: Solve for x
    x = 250,302,867,524,612,320/428,743,217.60
  6. Step 6: Final answer
    x = 583,806,010.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.